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Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states

Abstract: A search for the standard model Higgs boson decaying to a W-boson pair at the LHC is reported. The event sample corresponds to an integrated luminosity of 4.9 fb-1 and 19.4 fb-1 collected with the CMS detector in pp collisions at vs = 7 and 8 TeV, respectively. The Higgs boson candidates are selected in events with two or three charged leptons. An excess of events above background is observed, consistent with the expectation from the standard model Higgs boson with a mass of around 125 GeV. The probability to observe an excess equal or larger than the one seen, under the background-only hypothesis, corresponds to a significance of 4.3 standard deviations for mH = 125.6 GeV. The observed signal cross section times the branching fraction to WW for mH = 125.6 GeV is 0.72+0.20-0.18 times the standard model expectation. The spin-parity JP = 0+ hypothesis is favored against a narrow resonance with JP = 2+ or JP = 0- that decays to a W-boson pair. This result provides strong evidence for a Higgs-like boson decaying to a W-boson pair.

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 Fuente: Journal of High Energy Physics, Vol. 2014, Num. 1, Art. Num. 96

Editorial: Springer Verlag

 Fecha de publicación: 01/01/2014

Nº de páginas: 86

Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP01(2014)096

ISSN: 1126-6708,1029-8479

Url de la publicación: https://doi.org/10.1007/JHEP01(2014)096